All depends on who dose your build. One builders 426/440 excedra is not equal to another's
Just as one persons track time, is useless to another's unless you both ran exact time and even on same lane, which is impossible. Each driver is different, each temp/humidity, location, time of day is different from someone else's run, thus you can not compare, not to mention one person can run the exact truck at one time as someone else can run it at another. So many variables. So IMO unless your head up with someone your time is useless.. Same story gose for HP as no dyno is the same or exact run. ... Moral is just enjoy your ride and your mods for you and don't get caught up in the numbers